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Genetic Diversity Among Juglans Regiaand Prunus

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Genetic Diversity Among Juglans Regiaand Prunus Plant Archives Volume 20 No. 2, 2020 pp. 9693-9700 e-ISSN:2581-6063 (online), ISSN:0972-5210 GENETIC DIVERSITY AMONG JUGLANS REGIA AND PRUNUS DULCIS GENOTYPES USING RAPD AND ISSR MOLECULAR MARKERS Mohamed H. El-Sheikh1, Rehab Y. Ghareeb2 and Amira A. Ibrahim2* and Elsayed E. Hafez2 1Plant production Department, Arid Lands Cultivation Research Institute, City of Scientific Research and Technological Applications (SRTA- City), Universities and Research Center District, New Borg El-Arab, Alexandria, Egypt. 2*Plant Protection and Biomolecular Diagnosis Department, Arid Lands Cultivation Research Institute, City of Scientific Research and Technological Applications (SRTA-City), New Borg El-Arab, Alexandria, Egypt. Abstract Genetic variability among one genotype of walnut (Juglans regia L.) and three genotypes of almond (Prunus dulcis L.) were studied by using molecular characterization. Two markers generated variability among studied cultivars RAPD & ISSR. RAPD marker produce a total number of bands 63 consists of 27 monomorphic and 36 polymorphic bands, generated polymorphism as 57.14%. Among the resulted polymorphic bands, a13 unique bands were observed. Whenever, ISSR marker generates 68 total bands with 17 monomorphic bands and 51 polymorphic bands, from these polymorphic there were 17 unique bands. Obviously, ISSR gave polymorphism among the examined plants with percentage of 75%. Data of molecular attributes computed and illustrated highest similarity coefficient among hard and scrub almond genotypes (sweet almond) and also was represented in one cluster separated the studied 4 genotypes into two groups; one group includes walnut genotype and other group includes; sweet almond (scrub hard) and bitter almond. ISSR marker produces similarity of 75% higher than the RAPD marker 57.14%, so, ISSR molecular markers could be the suitable method to differentiate among walnut and almond genotypes rather than RAPD markers. Key words: Genetic polymorphism, Juglans regia, Prunus dulcis, RAPD-PCR and ISSR– PCR Introduction family Rosaceae, it is cultivated tree native to the Middle Cultivated Juglans regia L. is a monoecious and East and South Asia (Colic et al., 2012). It well known dichogamous species, considered as the most edible nuts that, Almond distributed in subtropical Mediterranean and economic species in family Juglandaceae and called climate therefore, the almond production is concentrated as Persian walnut (Tabasi et al., 2020). Persian walnut in some regions; Mediterranean and Asian countries is wildly distributed all over the tropical and temperate (Simsek and Demirkiran, 2010). Moreover, Almond regions of the world from Americans and Europe to Asia characterized by its resistance to salinity and drought, so (APG IV, 2016). Its fame due to the highest nutritive farmers prefer to cultivate it in the most cultivated areas value that contain and rich in proteins, minerals and fats, in the world (Sorkheh et al., 2011). in addition to it considered as one of the most natural Economic importance to almond due to its highest source of energy (Pereira et al. 2008). It has an effective content from oil and fatty acid. Total dry weight of almond effect on human health derived from its high antioxidant contains a percentage of oil varied from 48% to 67%. capacity, high concentration of fatty acids, as well as Their composition varied significantly from genotype to various vitamins of group B (Anderson et al., 2001). Oil another intra the same species. These oils includes both prepared from the walnut nut is immensely beneficial for of fatty acids and linoleic acids that considered the major women suffering from menstrual dysfunction (Ros and components in the oil, vartion from 12% to 27% was Mataix, 2006). recorded with fatty acids but it was ranged from 63% to The almond; Prunus dulcis L. (Batsch) belong to 78% oleic acids (Kodad and Socias, 2008). *Author for correspondence : E-mail : [email protected] Genetic variation for certain species is the key for 9694 Mohamed H. El-Sheikh et al. knowledge of management and future using of this species Table 2: Number of total bands, polymorphic bands and and/or its germplasm in plant breeding resulting in newly percentage of polymorphism of each primer cultivars (Bernard et al., 2018). Walnut and almond are generated. highly different in morphological and taxonomical features. Parameter RAPD ISSR So, studying the evaluation of genetic diversity among Studied taxa 4 4 different species based on; phenotypic and genotypic, No. of primers 6 6 so, molecular markers could be used to give definite Marker range (bp) 130-1300 100-1300 information about their genetic routes of each individual Total bands 63 68 in the same species (Ebrahimi et al., 2011). Actually, Monomorphic bands 27 17 morphological traits only not sufficient for accurate Polymorphic bands 36 51 identification of specific plant species (Kumar, 1999; No. of unique bands 13 17 Mahmoodi et al., 2013), morphological traits should be % Polymorphism 57.14% 75% confirmed by molecular characterization which resulted management and breeding for these important crops. in well classification and identification. The DNA markers are the efficient way has been suggested for the Materials and methods illustration of genetic variability and similarity within and Extraction of DNA among the genotypes (Kumar et al., 2019). There are Young leaves of one genotype of walnut (Juglans many molecular markers were used to differentiate among the walnut and almond genotypes such as regia L.) and three genotypes of almond Prunus dulcis isozymes (Viruel et al., 1995), RAPD (Gouta et al., L. (Batsch); one genotype of bitter almond and two types of sweet almonds; scrub Almond and hard almond were 2008), ISSR (Martins et al., 2003), RFLP (Tabasi et al., 2020; Wang et al., 2017), AFLP (Martins et al., 2001) extracted using CTAB buffer (Kriz¡man et al., 2006) and SNP (Wu et al., 2008). The common molecular and the resulted DNA was purified and both of purity and concentration of the extracted DNA were determined marker was used in genetic variation among walnuts was ISSR (Mahmoud and Abd El-Fatah, 2020). using Nano drop. Zhaobin et al., (2016) studied the biodiversity among PCR Reaction four Chinese wild almonds and two cultivars of Six primers of RAPD and six primers of ISSR were Amygdalus communis L. using SRAP marker. Studies used to study the genetic diversity; their name, bands of the genetic genetic polymorphism among different size and sequences were shown in table 1. In the PCR, cultivars of walnut and almond were little. Due to the reaction mixture was 20µl containing 10µl of 2x TOP low number of the articles studied the genetic simpleTM DyeMIX-HOT, 5µl of each Primer, 1µl of polymorphism among the walnut and almond; we aimed genomic DNA and volume was completed into 20 µl with to study the genetic diversity among different genotypes sterile water. The PCR schedule as; one cycle at 95ºC of almond and of walnut using the molecular maekers for 10min followed by 40 cycles of; 94ºC for 30 sec, RAPD-PCR and ISSR-PCR. This type of study will be 30ºC for 1min for each primer, 72ºC for 2min and a final important clues for plant species conservation and incubation at 72ºC for 5min. The PCR products were Table 1: List of RAPD and ISSR primers name, size ranges and their sequences. separated on a 1.5% agarose gel and the gel Marker Primer Sequence Size was visualized using DNA gel documentation name Range(bp) according to (Mandal et al., 2014). OP-A2 5´ GTG ATC GCA G 3‘ 200-500 Data analysis OP-A07 5´ GAA AGG GGT G 3‘ 130-500 All gels were photographed and analyzed RAPD OP- B7 5´ GGT GAC GCA G 3‘ 270-1300 using Bio-Rad video documentation system, OP-B11 5‘ GTA GAC CCG T 3‘ 250-1300 Model Gel Doc 2000. Only distinct, - - OP-C04 5 -CCG CAT CTA C- 3 280-900 reproducible, well-resolved fragments were OP-C9 5´ CTC ACC GTC C 3‘ 250-1300 scored as present (1) or absent (0) for each 14A 5 CTC TCT CTC TCT CTC TG 3‘ 100-800 of the RAPD and ISSR markers. 49A 5‘CAC ACA CAC ACA CAC AG 3‘ 400-1100 Dendrogram of cluster analysis and genetic ISSR HB-9 5‘ CAC ACA CAC ACA CAC A (AG) T 3‘ 150-1300 similarity were used to illustrate and estimate HB-10 5‘ (GAG) (AGA) TGC CC3‘ 150-1700 2 2 the genetic distances and relationships among HB-12 5‘ TCT CTC TCT CTC TCT CA 3‘ 100-1000 studied genotypes using the SYSTAT version HB-15 5´ GTG GTG GTG GC 3‘ 270-900 Genetic diversity among Juglans regia and Prunus dulcis genotypes using RAPD and ISSR molecular markers 9695 7.0 software (Wilkinso, 1997). lowest number of total bands as six bands with three monomorphic bands and three polymorphic bands as Results illustrated in table 2. Primers OPB7 and OPC4 gave For RAPD analysis highest number of unique bands as four bands. OPB7 Six primers were used with molecular size ranged produced three unique bands for bitter almond at size from 130-1300bp, about 63 total bands were generated 600, 1000 & 1300 bp. and one band unique characteristic with 27 monomorphic bands and 36 polymorphic bands for sweet almond (hard almond) at size 350 bp. Primer as shown in table 3. Primer OPC9 produced highest OPC4 generated three unique bands characteristic for number of total bands as 18 with 11 monomorphic bands walnut at sizes 280, 300 & 400 bp and one unique band and seven polymorphic bands. Primer OPA2 showed for sweet almond genotype (scrub almond). Regarding, Plate 1: RAPD-PCR product profiles of walnut and almond genotypes. M: DNA marker. 1: walnut. 2: sweet almond (scrub). 3: sweet almond (hard). 4: bitter almond. 9696 Mohamed H. El-Sheikh et al.
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